<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
testScope.jsp<br>
pageContext：<%=pageContext.getAttribute("pageContext")%><br>
request：<%=request.getAttribute("request")%><br>
session：<%=session.getAttribute("session")%><br>
application：<%=application.getAttribute("application")%><br>
</body>
</html>
